JP7416486B2 - Repair joint device and its assembly method - Google Patents

Description

The present disclosure relates to a repair joint device that is installed at a leakage site between pipes that flow a liquid and includes a split housing that is divided into a plurality of parts in the circumferential direction, and a method for assembling the same, and in particular, each split housing is welded together. The present invention relates to a repair joint device and an assembly method thereof, which can be joined by a simple welding process.

After water pipes, industrial pipes, etc. are buried, cracks may occur in the packing, pipe body, or joints, or welds may deteriorate due to changes over time or changes in the ground. In this case, the liquid flowing inside the pipe will leak.

Therefore, it has been considered to install a repair joint device that covers the entire joint to be repaired, including the leakage site, when liquid leaks from the pipe.

As such a repair joint device, for example, one that covers the first pipe and the second pipe constituting the pipe from the outer periphery and includes a plurality of divided housings is known.

In this case, the repair joint device includes the above-mentioned split housing that is split into a plurality of, for example two, parts in the circumferential direction.

When assembling such a repair joint device, it is convenient if the divided housings can be joined by welding, since the overall structure can be simplified.

JP 5-118491 JP2012-37041

The present disclosure has been made in consideration of these points, and provides a repair joint in which each split housing that constitutes a repair joint device can be joined by welding, and in which welding work can be easily performed. The purpose is to provide a device and a method for assembling the same.

The present disclosure relates to a repair joint that covers a pipe from the outer periphery, and includes a plurality of divided housings that are circumferentially divided and joined to each other via joint surfaces by welding, wherein each divided housing covers the pipe from the outer periphery. A seal storage space is formed between a covering split sleeve, a pair of end plates provided at both ends of the split sleeve in the axial direction, and the piping provided on the outer surface of each end plate in the axial direction, It has a seal housing protrusion extending in the circumferential direction, and each seal housing protrusion does not extend to the joint surface, and is connected to the seal housing protrusion of one divided housing of a pair of adjacent divided housings, and the seal housing protrusion of the other divided housing. A non-protrusion area is formed between the seal storage protrusion of the divided housing, and an auxiliary protrusion device is removably provided in this protrusion-free area to form an additional seal storage space between the piping. It is a coupling device.

In the present disclosure, the auxiliary protrusion device includes an auxiliary protrusion fitted into the non-protrusion area, and a seal storage protrusion of the one split housing and a seal storage protrusion of the other split housing by holding the auxiliary protrusion. The repair joint device includes an auxiliary fixture fixed to the protrusion.

The present disclosure is a repair joint device in which the seal housing protrusion of each divided housing is provided with a seal retainer ring fitting that holds the seal ring attached to the seal housing space and the additional seal housing space.

The present disclosure is a repair joint device in which the seal ring includes a pair of split seal rings that are split into two through a contact surface.

The present disclosure provides a method for assembling a repair joint device including a plurality of split housings that cover a pipe from the outer periphery, are divided in the circumferential direction, and are joined to each other via joint surfaces by welding. A seal storage space is formed between a covering split sleeve, a pair of end plates provided at both ends of the split sleeve in the axial direction, and the piping provided on the outer surface of each end plate in the axial direction. A step of preparing a plurality of divided housings each having a seal housing protrusion extending in the circumferential direction, wherein the seal housing protrusion of each divided housing does not extend to the joint surface, and installing each divided housing on the outer periphery of the piping. a step of forming a protrusion-free region between a seal storage protrusion of one split housing and a seal storage protrusion of the other split housing of a pair of adjacent split housings; a step of joining the housings by welding via the joint surfaces; a step of removing welding excess remaining on the joint surfaces of the pair of split housings; and storing an additional seal between the piping in the region without projections. A method for assembling a repair joint device includes a step of providing an auxiliary protrusion device that forms a space.
The present disclosure is a method for assembling a repair joint device, which removes welding excess remaining on at least a portion of the joint surfaces of the pair of split housings that corresponds to the non-protrusion area and the additional seal storage space. .

The present disclosure provides a repair method further comprising the steps of fitting a seal ring into the seal storage space and the additional seal storage space of each divided housing, and providing a seal holding ring fitting for holding the seal ring on the seal storage protrusion. This is a method of assembling a joint device.

According to the present disclosure, the overall structure can be simplified and the sealing performance can be improved.

FIG. 1 is a perspective view showing a repair joint device according to the present embodiment. FIG. 2 is a side view showing the repair joint device. FIG. 3 is a perspective view showing the divided housing. FIG. 4 is a perspective view showing a state in which a pair of split housings are arranged and welded around the outer peripheries of the first pipe and the second pipe. FIG. 5 is an enlarged view showing the divided housing shown in FIG. 4. FIG. 6 is a diagram showing how the welding excess of the split housing is removed using a grinder. FIG. 7 is a diagram in which an auxiliary protrusion device is provided in a region without protrusions of the split housing. FIG. 8 is a diagram in which the auxiliary protrusion device is fixed. FIG. 9 is a diagram showing a state in which the seal ring is fitted into the split housing.

<This embodiment>
Hereinafter, a repair joint device according to this embodiment will be explained with reference to FIGS. 1 to 9.

As shown in FIGS. 1 and 2, a repair joint device 10 according to the present embodiment includes a cylindrical leak pipe (first pipe) 1 having an axis passing through the center, and a cylindrical leak pipe having an axis passing through the center. (Second piping) 2 from the outer periphery, and includes a plurality of, for example, two divided housings 11, 11.

Further, the two divided housings 11, 11 are divided into two parts in the circumferential direction, and are welded and joined to each other via the joint surface 13.

The upper divided housing 11 constitutes the upper half of the repair joint device 10, and the lower divided housing 11 constitutes the lower half of the repair joint device 10.

Further, as shown in FIGS. 1 and 2, each divided housing 11 includes a semi-cylindrical divided sleeve 11A that covers the first pipe 1 and the second pipe 2 from the outer periphery, and a first pipe along the axial direction of the divided sleeve 11A. It includes an end plate 21 provided at one end on the first side and an end plate 21 provided at the other end on the second pipe 2 side.

Note that the repair joint device 10 mainly deals with liquid leakage from the joint surface 3 between the first pipe 1 and the second pipe 2; It may also be a measure against leakage due to damage. In this case, the repair joint device 10 is provided to cover the outer periphery of either the damaged first pipe 1 or the second pipe 2.

As described above, a pair of end plates 21, 21 are provided at both ends of the divided sleeve 11A of each divided housing 11 in the axial direction. Further, a seal storage protrusion 22 that forms a seal storage space 35 is provided between the first pipe 1 or the second pipe 2 corresponding to the outer surface in the axial direction of each end plate 21, 21. The seal housing protrusion 22 is formed to extend in the circumferential direction on the axially outer surface of each end plate 21, 21, and a seal ring 30, which will be described later, is inserted into the seal housing space 35.

By the way, each seal storage protrusion 22 does not extend to the joint surface 13 between the split housings 11, and among a pair of adjacent split housings 11, the seal storage protrusion 22 of one split housing 11 and the other split housing Protrusion-free areas 23, 23 are formed between the seal storage protrusions 22 of No. 11 and 11. The protrusion-free areas 23, 23 formed between the seal-accommodating protrusion 22 of one split housing 11 and the seal-accommodating protrusion 22 of the other split housing 11 are and a non-protrusion area 23 of the other divided housing 11.

By providing the protrusion-free areas 23, 23 between the seal storage protrusions 22, 22 of the split housings 11, 11 in this way, when welding the split housings 11, 11 through the joint surface 13 as described later, Among the housings 11, 11, in particular, welding work on the end plates 21, 21 and removal work of welding excess welding after welding can be easily performed.

For example, the seal storage protrusions 22, 22 are provided up to the joint surface 13, that is, to the ends of the end plates 21, 21, without providing the non-protrusion areas 23, 23 on the end plates 21, 21 of the divided housings 11, 11. In this case, the work of welding the end plates 21, 21 together becomes complicated, and the work of removing the welding excess is also difficult. On the other hand, according to the present embodiment, by providing the non-protrusion areas 23, 23 between the seal storage protrusions 22, 22 of the split housings 11, 11, the welding operation on the end plates 21, 21 and the post-weld It is possible to easily remove welded excess metal.

In this way, the projection-free areas 23, 23 formed between the seal storage projections 22, 22 of the divided housings 11, 11 are provided with additional space between the corresponding first pipe 1 or second pipe, as described later. An auxiliary projection device 25 that forms a seal storage space 36 is removably attached.

This auxiliary protrusion device 25 includes an auxiliary protrusion 26 that is fitted into the non-protrusion areas 23, 23 formed between the seal housing protrusions 22, 22 of the divided housings 11, 11, and an auxiliary fixture 27 that holds the auxiliary protrusion 26. and has. In this case, an additional seal storage space 36 is formed between the first pipe 1 and the second pipe 2 by the auxiliary protrusion 26 of the auxiliary protrusion device 25 . Further, the auxiliary fixture 27 is fixed to the auxiliary protrusion 26 with a mounting bolt 28. The auxiliary protrusion device 25 configured in this manner is attached to the seal storage protrusion 22 of each divided housing 11, 11 by a mounting bolt 29 extending through the auxiliary fixture 27.

In this case, the mounting bolt 29 extending through the auxiliary fixture 27 of the auxiliary protrusion device 25 is inserted into the opening 22b formed on the outer surface in the radial direction of the seal storage protrusion 22 provided in each divided housing 11, 11. (See Figure 7).

Further, in FIGS. 5 to 8, openings 22a are also formed on the outer surfaces in the axial direction of the seal housing protrusions 22, 22 provided in the respective divided housings 11, 11.

As described above, the seal storage space 35 is formed between the first pipe 1 and the second pipe 2 by the seal storage projections 22, 22 provided on the divided housings 11, 11, and the seal storage space 35 is formed between the first pipe 1 and the second pipe 2. , an additional seal storage space 36 is formed between the first pipe 1 and the second pipe 2, and the seal ring 30 is installed in the seal storage space 35 and the additional seal storage space 36.

Next, the seal ring 30 installed in the seal storage space 35 and the additional seal storage space 36 will be described. The seal ring 30 is made of elastic rubber, has a wedge shape, and includes a pair of divided seal rings 31 and 32. The split seal rings 31, 32 are in contact with each other via an inclined contact surface 30a.

The seal ring 30 is installed in the seal storage space 35 and the additional seal storage space 36, and the seal press ring fitting 24 is fitted into the seal storage space 35, and the bolt is inserted through the bolt hole drilled in the seal press ring fitting 24. 38 is passed through the seal retainer ring fitting 24. Next, the bolt 38 is inserted into the opening 22a provided on the axially outer surface of the seal housing projection 22 and tightened. At this time, the split seal rings 31 and 32 are compressed in the axial direction by the seal holding ring fitting 24, and the split seal rings 31 and 32 are also moved in the radial direction by the inclined contact surface 30a, so that the end plate 21 and the seal A seal ring 30 is formed that contacts the storage projection 22, the auxiliary projection 26 of the auxiliary projection device 25, and the corresponding first pipe 1 or second pipe 2.

In this embodiment, the inclination angle (wedge angle) of the contact surface 30a between the split seal rings 31 and 32 is set to, for example, 45°.

In this embodiment, the repair joint device 10 seals the liquid leaking from the joint surface 3 between the first pipe 1 and the second pipe 2 to be repaired. An air inlet/outlet 47 is provided at the upper end of the repair joint device 10, and a drain outlet 48 is provided at the lower end, but these are closed during construction, and the interior of the repair joint device 10 is sealed after repair.

Next, the seal ring 30 will be further described. FIG. 9 shows a cross-sectional view of the seal portion during assembly when no axial pressure is applied to the split seal rings 31 and 32 constituting the seal ring 30. Grooves 31a and 31b forming lips are formed on the axial inner surface and contact surface 30a of one of the wedge-shaped split seal rings 31 and 32 arranged oppositely, and the other split seal ring 31 has grooves 31a and 31b forming lips, respectively. A groove 32a forming a lip is provided on the bottom surface of the seal ring 30, and the height of the seal ring 30 is H. When a fastening force is applied in the axial direction, the split seal rings 31 and 32 are compressed in the axial direction and expand radially outward, sealing the upper and lower seal surfaces of the seal storage space 35 and the additional seal storage space 36. When a fastening force is applied in the axial direction on the opposing contact surfaces 30a, the wedge-shaped contact surfaces 30a are compressed in the axial direction and slide up in the radial direction, increasing the height of the seal ring 30 and further increasing the sealing pressure. . The wedge angle α of the seal ring 30 is formed to be about 45°, and by compressing the seal ring 30 in the axial direction, the seal ring 30 can press the end plates 21 of the split housings 11, 11 with a larger force. I can do it. Furthermore, by compressing the seal ring 30 in the axial direction, the seal ring 30 presses the seal housing protrusion 22, the auxiliary protrusion 26 of the auxiliary protrusion device 25, and the corresponding first pipe 1 or second pipe 2. Thereby, the interior of the repair joint device 10 can be reliably sealed by the seal ring 30.

Next, a method of assembling the repair joint device having such a configuration will be explained with reference to FIGS. 3 to 9.

First, as shown in FIG. 3, there is a split sleeve 11A that covers the first pipe 1 and the second pipe 2 from the outer periphery, a pair of end plates 21, 21 provided at both ends of the split sleeve 11A in the axial direction, and a pair of end plates 21, 21 at each end. A pair of split housings 11 are prepared, each having a seal storage protrusion 22 provided on the outer surface of the plate 21 in the axial direction and forming a seal storage space 35 between the first pipe 1 and the second pipe 2. In this case, in each divided housing 11, the seal housing protrusion 22 does not extend to the joint surface 13 of the divided housing 11.

Next, as shown in FIGS. 4 and 5, a pair of split housings 11 are placed around the first and second pipes. At this time, of the pair of adjacent divided housings 11, no-protrusion areas 23, 23 are formed between the seal accommodating protrusion 22 of one divided housing 11 and the seal accommodating protrusion 22 of the other divided housing 11. The protrusion-free areas 23, 23 formed between the seal-accommodating protrusion 22 of one split housing 11 and the seal-accommodating protrusion 22 of the other split housing 11 are and a non-protrusion area 23 of the other divided housing 11.

Thereafter, the pair of split housings 11 are joined by welding via the joint surfaces 13. At this time, welding excess 13a is formed along the joint surfaces 13 of the pair of split housings 11 and outside the joint surfaces 13. In this case, since the protrusion-free areas 23, 23 are formed between the seal storage protrusions 22, 22 of the split housings 11, 11, the seal storage protrusions 22, 22 of the end plates 21, 21 of the split housings 11, 11 are formed. In the vicinity of 22, 22, welding work can be performed more easily than in the case where the seal housing protrusions 22, 22 are provided up to the joint surface 13.

Next, the welding excess 13a remaining along the joint surface 13 of the pair of split housings 11, 11 joined by welding through the joint surface 13 is removed using a grinder 40 (see FIG. 6). .

In this case, the welding excess 13a remaining on the joint surfaces 13 of the pair of split housings 11, 11, which corresponds to at least the non-projection regions 23, 23 of the end plates 21 and the additional seal storage space 36, is removed using a grinder 40. and remove it. At this time, since the protrusion-free regions 23, 23 are formed between the seal-accommodating protrusions 22, 22 of the split housings 11, 11, the protrusion-free regions 23, 23 between the seal-accommodating protrusions 22, 22 of the end plate 21, 23 and the additional seal storage space 36, the welding excess 13a on the joint surface 13 can be easily removed using the grinder 40.

In this way, the welding excess 13a remaining in the non-protrusion areas 23, 23 between the seal storage protrusions 22, 22 and the welding excess 13a remaining in the portion corresponding to the additional seal storage space 36 of the end plate 21, It can be reliably removed using the grinder 40. As a result, the end plate 21 that the auxiliary protrusion device 25 abuts and the end plate 21 that the seal ring 30 in the additional seal storage space 36 abuts can be smoothed, and the end plate 21 and the auxiliary protrusion device 25 and The adhesion between the end plate 21 and the seal ring 30 can be improved, and the seal ring 30 can be used to improve the sealing performance of the repair joint device 10.

The grinder 40 has such a shape that its operating portion 40a can be inserted into the non-protrusion areas 23, 23 between the seal housing protrusions 22, 22.

Thereafter, as shown in FIG. 7, an auxiliary projection device forms an additional seal storage space 36 between the first pipe and the second pipe 2 in the non-projection areas 23, 23 between the seal storage projections 22, 22. Attach 25. In this case, an additional seal storage space 36 is formed between the auxiliary protrusion 26 of the auxiliary protrusion device 25 and the first pipe 1 and the second pipe 2.

Next, a mounting bolt 29 is provided passing through the auxiliary fixture 27 of the auxiliary protrusion device 25, and by inserting the mounting bolt 29 into the opening 22b of the seal storage protrusion 22, 22, the auxiliary protrusion device 25 is assembled into a pair of It is fixed within the split housings 11, 11 (see FIG. 8).

Next, as shown in FIG. 9, the seal ring 30 is fitted into the seal storage space 35 and the additional seal storage space 36 of the pair of split housings 11, 11. Thereafter, the seal retaining ring fitting 24 for holding the seal ring 30 is attached to the seal housing protrusion 22, and the bolt 38 is attached passing through the seal retaining ring fitting 24. This bolt 38 is then inserted into the opening 22a of the seal storage projection 22, and by tightening the bolt 38, the seal ring 30 can be pressed along the axial direction by the seal presser ring fitting 24.

Moreover, by pressing the seal ring 30 along the axial direction in this way, the seal ring 30 is attached to the end plate 21, the seal storage protrusion 22, the auxiliary protrusion device 25, the first pipe 1 and the second pipe 2. This allows the interior of the repair joint device 10 to be sealed.

As described above, according to this embodiment, the seal housing protrusions 22, 22 of the pair of split housings 11, 11 do not reach the joint surface 13, and the seal housing protrusions 22, 22 of the pair of split housings 11, 11 do not reach the joint surface 13. , 22 are formed with non-protrusion regions 23, 23. Therefore, compared to the case where the seal storage protrusions 22, 22 of the pair of split housings 11, 11 reach the joint surface 13, the end plate of the split housings 11, 11, especially near the seal storage protrusions 22, 22 At 21, welding work along the joint surface 13 can be performed easily and accurately. Further, after welding, the welding excess 13a remaining along the joint surface 13 can be easily removed, particularly on the end plate 21 near the seal storage projections 22, 22.

Furthermore, the welding excess 13a remaining in the areas corresponding to the non-protrusion areas 23, 23 formed between the seal housing protrusions 22, 22 of the pair of split housings 11, 11 and the additional seal housing space 36 is removed using a grinder 40. can be removed and smoothed. As a result, the auxiliary protrusion device 25 can be attached closely to the end plate 21 corresponding to the non-protrusion areas 23, 23, and the seal ring 30 in the additional seal storage space 36 can be attached to the end plate 21. By using the seal ring 30, the sealing performance of the repair joint device 10 can be further improved.

1 First pipe 2 Second pipe 3 Joint surface 10 Repair joint device 11 Split housing 11A Split sleeve 13 Joint surface 13a Welding excess 21 End plate 22 Seal storage projection 22a Opening 22b Opening 23 No projection area 24 Seal retainer ring fitting 25 Auxiliary projection device 26 Auxiliary projection 27 Auxiliary fixture 28 Mounting bolt 29 Mounting bolt 30 Seal ring 30a Contact surface 31 Split seal ring 31a Groove 31b Groove 32 Split seal ring 32a Groove 35 Seal storage space 36 Additional seal storage space 38 Bolt 40 Grinder 47 Air inlet/outlet 48 Drain outlet

Claims (7)

In a repair joint that covers a pipe from the outer periphery and includes a plurality of divided housings that are divided in the circumferential direction and joined to each other via joint surfaces by welding,
Each divided housing includes a divided sleeve that covers the pipe from the outer periphery;
a pair of end plates provided at both ends of the split sleeve in the axial direction;
Each end plate has a seal storage protrusion provided on the outer surface in the axial direction, forming a seal storage space between the end plate and the piping, and extending in the circumferential direction;
Each seal storage protrusion does not extend to the joint surface, and is a protrusion between the seal storage protrusion of one split housing and the seal storage protrusion of the other split housing of a pair of adjacent split housings. A repair joint device in which a non-protrusion region is formed, and an auxiliary protrusion device is removably provided in the non-protrusion region to form an additional seal storage space between the pipe and the piping. The auxiliary protrusion device includes an auxiliary protrusion that is fitted into the non-protrusion area, and a seal accommodating protrusion that holds the auxiliary protrusion and is fixed to the seal accommodating protrusion of the one divided housing and the seal accommodating protrusion of the other divided housing. The repair joint device according to claim 1, further comprising an auxiliary fixing device. 3. The repair joint device according to claim 1, wherein the seal storage protrusion of each divided housing is provided with a seal retaining ring fitting for holding the seal ring attached to the seal storage space and the additional seal storage space. . 4. The repair joint device according to claim 3, wherein said seal ring includes a pair of split seal rings split into two through a contact surface. In a method for assembling a repair joint device including a plurality of divided housings that cover piping from the outer periphery, are divided in the circumferential direction, and are joined to each other via joint surfaces by welding,
A split sleeve that covers the pipe from the outer periphery, a pair of end plates provided at both ends of the split sleeve in the axial direction, and a seal storage space provided on the outer surface of each end plate in the axial direction between the pipe and the pipe. and preparing a plurality of split housings having seal storage protrusions extending in the circumferential direction, the seal storage protrusions of each split housing not extending to the joining surface;
A step of installing each divided housing on the outer periphery of the piping, wherein there is no protrusion between the seal housing protrusion of one divided housing and the seal housing protrusion of the other divided housing among a pair of adjacent divided housings. a step of forming a region;
a step of joining a pair of split housings by welding via the joining surface;
removing welding excess remaining on the joint surfaces of the pair of split housings;
A method for assembling a repair joint device, comprising: providing an auxiliary protrusion device in the non-protrusion region to form an additional seal storage space between the pipe and the piping. 6. The method for assembling a repair joint device according to claim 5, wherein welding excess remaining on at least a portion of the joint surfaces of the pair of split housings corresponding to the non-protrusion area and the additional seal storage space is removed. Claim 5 or 6, further comprising the step of fitting a seal ring into the seal storage space and the additional seal storage space of each divided housing, and providing a seal holding ring fitting for holding the seal ring on the seal storage protrusion. How to assemble the described repair fitting device.

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